Novel Fractional Filter based Control Technique for AC-DC grid Operation

Abstract

This paper proposes a novel fractional filter-based control technique (NFFCT) to facilitate a combined Ac-Dc grid operation. The combined operation offers lesser component requirements and better synchronization without requiring additional voltage and frequency controllers. To obtain optimum power from solar PV and regulate the duty ratio of the boost converter, the most common perturb and observe-based maximum power point algorithm (PO-MPPA) is used. The change in climatic conditions affects power generation. Therefore, an energy storage (ES) device is connected to the Dc-grid by using a dc-dc converter. The suggested NFFCT not only offers better power management but also regulates the power quality (PQ) during non-linear load applications and demand variation. During the design of NFFCT, the system avoids excess filter requirements and reduces the use of excess transformation, which reduces the system complexity and reduces the computational burden during complex system applications. To evaluate the modeled Ac-Dc-based microgrid operation, the outcomes of the proposed NFFCT -based system are compared with the most common synchronous reference frame (SRF) based system approach and found better results as per the international standards.